Sunday, September 18, 2011

Blog #5

         In physics we continue to learn about kinematics. This week we focused more on objects and it being tossed into the air. In class we did a lab to collect data of a ball and its trip in the air. Three different graphs were used with the data to show the graphs relationships. The three graphs were a distance over time graph, a velocity over time graph and a acceleration over time graph. These three graphs provided proof that objects thrown in the air go fast, slow, stop at the point, then goes slow to fast again. When the object gets back to its starting point it is going as fast as it was when it was tossed up. The picture above is of me "skurfing". When doing this we can turn towards the wake and ramp up it to get into the air. The hard part about it is landing because we are hitting the water at the same speed from when I ramped up the wake. Landing at the water at that high speed makes it hard to not tumble over. The cool part about jumping the wake is that at one point we are hanging in mid-air, even though it may only be for a split second.

Sunday, September 11, 2011

Blog #4

           This week in physics we continued to learn about kinematics. We started to learn more about the affects of gravity on moving objects. So for my visual media I chose to drop a ball from the top of the stairs. A simple ball being released from a hight is a part of physics. The ball starting at rest will accelerate as it is pulled by gravity until it hits the ground. The ball starts with an initial velocity of 0 meters per second because it starts at rest and it was not pushed or tossed down by me. It fell from the hight of 8 feet or approximately 2.5 meters. With a acceleration of 9.8 meters per second squared, the ball's final velocity was 7 meters per second. Knowing that the distance was 2.5 meters, the initial velocity was 0 m/s and the final velocity was 7 m/s we can tell that the time it took for the ball to hit the ground was 5/7 of a second. Isn't it cool that we can figure all this out because we know physics? It ain't anywhere as cool as the video I made.

Blog #3

      This is my 3rd blog about physics. Yes it was late due to a very exciting and no doing homework labor day weekend. Anyways, this week in physics we learned more about kinematics. As my example of kinematics in the world I chose to display a picture of a truck. This truck is an F-150 made in the year 2002 with a v8 which means it basically sucks up a lot of gas. This truck has to do with kinematics because it moves. This week we learned more about acceleration and that it can move in a positive or negative direction. For example, if this truck were mine and I drove it down the street at 20 mph then the truck would have a velocity of 20 mph. If I stepped on the gas pedal harder then the car would accelerate in the positive direction, which in this case makes the car go faster. So lets say I am going 30 mph now. If I were to step on the break then my acceleration would be going in the negative direction because I am slowing down thus changing my velocity. Since I was not going a uniform speed, my average velocity would be between 25 mph.        WOW! Physics is everywhere!

Blog #1

              For our first blogpost we were suppose to find something that relates to what we did in class this week. Well this week (or the week that this was suppose to be done on) we studied relationships. We spent most of our class time collecting data from a pendulum lab to find out which variable affects the period of the pendulum and what kind of relationship it has. From there we had to go out and look for something in the world that deals with relationships. I picked a three-prong spear. The relationship of the spear's distance to the rubber band's stretch has a direct relationship. The greater the band is stretched along the pole toward the prongs the farther the spear will move in the water. This relationship allows us to spear fish without having to throw the spear like we would on land.